Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 150 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — acid and base, indicator colours, chemical change, what seeds and yeast need, transpiration, crystals or filtering. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.🫗 How do we separate sugar from sugar water? (a) winnowing (b) sieving (c) filtering (d) evaporating
3. 3.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.🫗 How do we separate small stones from dal? (a) handpicking (b) evaporating (c) filtering (d) winnowing
6. 6.🔮 Predict: you use plain water instead of vinegar. What happens? (a) the balloon bursts (b) it turns to honey (c) a huge eruption (d) very little fizzing
7. 7.True or false: hold the plant in soil is a job of the flower. (a) True (b) False
8. 8.🧺 Do we need sunlight for the leafy bag test? (a) not needed (b) needed
9. 9.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
10. 10.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) put it in your mouth (c) seal it in a glass jar (d) keep it away from eyes
11. 11.🔮 Can the brown writing go back to being invisible? (a) yes, in the dark (b) yes, if shaken (c) yes, if cooled (d) no, it stays brown
12. 12.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
13. 13.True or false: moong seeds is needed for sprouting seeds. (a) True (b) False
14. 14.🧺 Which of these is not needed for the fizzy balloon? (a) an empty bottle (b) a magnet (c) a funnel or spoon (d) a tray for spills
15. 15.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) turmeric powder (b) a bowl (c) a timer (d) cold water to rinse
16. 16.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they grow fruit (b) they sprout faster (c) they do not sprout (d) they glow
17. 17.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it fizzes (d) it turns sweet
18. 18.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) white at once (c) bright blue (d) green
19. 19.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
20. 20.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the same kind of bag is kept the same. (a) False (b) True
21. 21.🧺 Which of these is not needed for the secret lemon message? (a) lemon juice (b) a cotton bud (c) turmeric powder (d) an adult with an iron
22. 22.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) rusting iron (d) freezing water
23. 23.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) lemon juice (c) soap solution (d) vinegar
24. 24.🧺 Do we need a potted plant for the leafy bag test? (a) needed (b) not needed
25. 25.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the size of the plant (b) the kind of plant (c) sun or shade (d) the time we wait
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a balloon (d) a spoon
27. 27.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same muddy water (b) the same funnel (c) how clear the water is (d) the filter material
28. 28.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) it turns blue (c) there is no change (d) it grows bigger
29. 29.🪴 Which of these is a job of the leaves? (a) hold up the leaves (b) hold the plant in soil (c) make food in sunlight (d) take in water from soil
30. 30.🧺 Which of these is not needed for the muddy water filter? (a) a clean glass (b) a funnel (c) a magnet (d) muddy water
31. 31.🧺 Do we need a battery cell for the leafy bag test? (a) not needed (b) needed
32. 32.🛟 What should you do after handling muddy water? (a) nothing is needed (b) lick your fingers (c) wash hands afterwards (d) wipe hands on face
33. 33.🧺 Do we need a battery cell for making butter? (a) needed (b) not needed
34. 34.🧺 Do we need water for sprouting seeds? (a) not needed (b) needed
35. 35.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
36. 36.🌱 Is warmth needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is kept the same. (a) True (b) False
38. 38.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) water (b) cotton wool (c) a small bowl (d) a mirror
39. 39.🫧 Which of these is a base? (a) soap solution (b) tamarind water (c) orange juice (d) curd
40. 40.🔍 Which is the odd one out? (a) cooking oil (b) small pebbles (c) sawdust (d) glucose powder

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